Let's start by looking at DRX's map preference.
Maps that DRX like: Breeze > Haven > Fracture > Ascent
Maps that DRX are okay with: Bind > Icebox
Maps that DRX hate: Pearl
I'm not sure about LOUD so I won't comment on their map pool, but here are the key points I have gathered:
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Pearl is BOTH DRX and LOUD's PERMABAN
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Breeze is 100% going to be played, and we are very likely to see Ascent and/or Fracture
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LOUD much prefers Icebox
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DRX much prefers Haven, Fracture
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Bind is a bad map for BOTH teams
There are 2 likely scenarios that are being played in my head. Both teams ban Pearl first to eliminate the risk of the other team picking it as a trump card. Or, both teams float Pearl knowing this fact and bans the other team's best map instead.
Final Map Pool Predictions
Scenario 1
LOUD ban Haven; DRX ban Icebox; LOUD pick Ascent; DRX pick Fracture; LOUD ban Bind/Pearl; DRX ban Bind/Pearl; Breeze remains
Scenario 2
LOUD ban Pearl; DRX ban Icebox; LOUD pick Ascent; DRX pick Haven; LOUD ban Fracture; DRX ban Bind; Breeze remains
or if DRX starts to ban
DRX ban Pearl; LOUD ban Haven; DRX pick Fracture; LOUD pick Icebox; DRX ban Ascent; LOUD ban Bind; Breeze remains
TLDR: The 3 Maps Shall Be:
Ascent, Fracture, Breeze;
Ascent, Haven, Breeze;
Fracture, Icebox, Breeze
Notice that a gameplan from DRX could be formed in scenario 2 if they prep super hard for Icebox and let it go through. DRX haven't played icebox yet while LOUD has therefore DRX could heavily anti-strat the map. But I really doubt they will resort to this option because DRX generally don't like Icebox.